<script setup>
    import {ref, getCurrentInstance, onMounted, reactive} from 'vue'
    import * as echarts from 'echarts'
    //observer 接收观察器实例对象
    const observer = ref(null)

    const { proxy } = getCurrentInstance()

    const getImageUrl = (user)=>{
        return new URL(`../assets/images/${user}.png`, import.meta.url).href
    }

    const tableData = ref([])
    const countData = ref([])
    const tableLabel = ref({
        name: "课程",
        todayBuy: "今日购买",
        monthBuy: "本月购买",
        totalBuy: "总购买",
    })

    //这个是折线图和柱状图 两个图表共用的公共配置
    const xOptions = reactive({
        // 图例文字颜色
        textStyle: {
            color: "#333",
        },
        legend: {},
        grid: {
            left: "20%",
        },
        // 提示框
        tooltip: {
            trigger: "axis",
        },
        xAxis: {
            type: "category", // 类目轴
            data: [],
            axisLine: {
            lineStyle: {
                color: "#17b3a3",
            },
            },
            axisLabel: {
            interval: 0,
            color: "#333",
            },
        },
        yAxis: [
            {
            type: "value",
            axisLine: {
                lineStyle: {
                color: "#17b3a3",
                },
            },
            },
        ],
        color: ["#2ec7c9", "#b6a2de", "#5ab1ef", "#ffb980", "#d87a80", "#8d98b3"],
        series: [],
    })

    const pieOptions = reactive({
    tooltip: {
        trigger: "item",
    },
    legend: {},
    color: [
        "#0f78f4",
        "#dd536b",
        "#9462e5",
        "#a6a6a6",
        "#e1bb22",
        "#39c362",
        "#3ed1cf",
    ],
    series: []
    })

    //请求图表数据并渲染的方法
    const getChartData = async () => {
        const {orderData,userData,videoData} = await proxy.$api.getChartData()
        //对第一个图表的xAxis和series赋值
        xOptions.xAxis.data=orderData.date
        xOptions.series = Object.keys(orderData.data[0]).map(val=>({
        name:val,
        data:orderData.data.map(item=>item[val]),
        type: "line"
        })
        )
        //one               echarts.init方法初始化ECharts实例，需要传入dom对象
        const OneEcharts = echarts.init(proxy.$refs["echart"])
        //setOption方法应用配置对象
        OneEcharts.setOption(xOptions)
        
        //对第二个图表的xAxis和series赋值
        xOptions.xAxis.data = userData.map((item) => item.date)
        xOptions.series = [
            {
            name: "新增用户",
            data: userData.map((item) => item.new),
            type: "bar",
            },
            {
            name: "活跃用户",
            data: userData.map((item) => item.active),
            type: "bar",
            }
        ]
        //two
        const TwoEcharts = echarts.init(proxy.$refs["userEchart"])
        TwoEcharts.setOption(xOptions)
        
        //对第三个图表的series赋值
        pieOptions.series = [
            {
            data: videoData,
            type: "pie",
            },
        ]
        //three
        const ThreeEcharts = echarts.init(proxy.$refs["videoEchart"])
        ThreeEcharts.setOption(pieOptions);

        //ResizeObserver 如果监视的容器大小变化，如果改变会执行传递的回调
        observer.value = new ResizeObserver(entries => {
            OneEcharts.resize()
            TwoEcharts.resize()
            ThreeEcharts.resize()
        })
        //如果这个容器存在
        if (proxy.$refs["echart"]) {
            //则调用监视器的observe方法，监视这个容器的大小
        observer.value.observe(proxy.$refs["echart"]);
        }
    }
    const getTableData = async ()=>{
       const data =  await proxy.$api.getTableData()
       tableData.value = data.tableData
    }
    const getCountData = async ()=>{
       const data =  await proxy.$api.getCountData()
       countData.value = data
    }
    onMounted(()=>{
        getTableData(),
        getCountData(),
        getChartData()
    })
</script>

<template>
    <el-row class="home" :gutter="20">
        <el-col :span="8" style="margin-top: 10px">
            <el-card shadow="hover">
                <div class="user">
                    <img :src="getImageUrl('user')" class="user">
                        <div class="user-info">
                            <p class="user-info-admin">Admin</p>
                            <p class="user-info-p">超级管理员</p>
                        </div>
                    </img>
                </div>
                <div class="login-info">
                    <p>上次登录时间：<span>2024-06-30</span></p>
                    <p>上次登录地点：<span>上海</span></p>
                </div>
            </el-card>
            <el-card shadow="hover" class="user-table">
                <el-table :data="tableData">
                    <el-table-column
                        v-for="(val, key) in tableLabel"
                        :key="key"
                        :prop="key"
                        :label="val"
                    />
                </el-table>
            </el-card>
        </el-col>
        <el-col :span="16" style="margin-top: 10px">
            <div class="num">
                <el-card
                :body-style="{display:'flex', padding:0}" 
                v-for="item in countData"
                :key="item.name"
                >
                <component :is="item.icon" class="icons" :style="{background: item.color}"></component>
                <div class="detail">
                    <p class="num">¥{{ item.value }}</p>
                    <p class="txt">{{ item.name }}</p>
                </div>            
                </el-card>
            </div>
            
            <el-card class="top-echart">
                <div ref="echart" style="height: 280px;"></div>
            </el-card>

            <div class="graph">
                <el-card>
                    <div ref="userEchart" style="height: 240px"></div>
                </el-card>
                <el-card>
                    <div ref="videoEchart" style="height: 240px"></div>
                </el-card>
            </div>
        </el-col>
    </el-row>
</template>

<style scoped lang="less">
    .home{
        height: 100%;
        overflow: hidden;
        .user{
            display: flex;
            align-items: center;
            border-bottom: 1px solid #ccc;
            margin-bottom: 20px;
            img{
                width: 150px;
                height: 150px;
                border-radius: 50%;
                margin-right: 40px;
            }
            .user-info{          
                p{
                    line-height: 40px;
                }
                .user-info-p{
                    color: #999;
                }
                .user-info-admin{
                    font-size: 35px;
                }
            }
        }
        .login-info{
            p{
                line-height: 30px;
                font-size: 14px;
                color: #999;
                span{
                    color: #666;
                    margin-left: 60px;
                }
            }
        }
    }
    .user-table{
        margin-top: 20px;
    }
    .num{
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        .el-card{
            width: 32%;
            margin-bottom: 20px;
        }
        .icons{
            width: 80px;
            height: 80px;
            font-size: 30px;
            text-align: center;
            line-height: 80px;
            color: #fff;
        }
        .detail{
            margin-left: 15px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            .num{
                font-size: 30px;
                margin-bottom: 10px;
            }
            .txt{
                font-size: 15px;
                text-align: center;
            }
        } 
    } 
    .graph{
            margin-top: 20px;
            display: flex;
            justify-content: space-between;
            .el-card{
                width: 48%;
                height: 260px;
            }
    }  
</style>
